西北地区自然环境得天独厚，既具有悠久的历史文化，又具有深厚的民族体育传统。
The northwest has abundant natural environment long historical culture and profound national sports tradition.
尤其是西北地区的部分城市绿化覆盖率不足5 % ，城市环境容量非常有限。
Especially in the north-west of China, many cities have proportion of green areas less than 5%.
西北地区水资源短缺，生态环境相当脆弱。
Northwest China is very short of water resources and its ecological environment is very brittle.
西北地区生态环境需水研究是生态环境建设的重要基础。
Study on evaluation of eco-water demand in Northwest China is very important on eco-system building.
西北地区生态环境需水研究是生态环境建设的重要基础。
Study on evaluation of eco-water demand in Northwest China is very important on eco-system building.
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